Install script requires manual answering of question about "Iperf3 daemon"

[EskoDijk]

During the Debian bookworm install: it asks with a blue screen and selection box whether the Iperf3 daemon should be enabled or not.

This blocks the automatic build flow. As I understand this question can be "pre-seeded" i.e. answered before the install starts, using: https://manpages.debian.org/testing/debconf/debconf-set-selections.1.en.html

Gemini suggested (not verified!) that this could be used for the "yes" answer:

echo "iperf3 iperf3/start_daemon boolean true" | sudo debconf-set-selections
sudo apt-get install -y iperf3

and false for the "no" answer to the question.